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dc.contributor.authorGao, Guoying-
dc.contributor.authorOganov, Artem R.-
dc.contributor.authorBergara, Aitor-
dc.contributor.authorMartínez-Canales, Miguel-
dc.contributor.authorCui, Tian-
dc.contributor.authorIitaka, Toshiaki-
dc.contributor.authorMa, Yanming-
dc.contributor.authorZou, Guangtian-
dc.identifier.citationPhys. Rev. Lett. 101, 107002 (2008)en_US
dc.description4 pages, 3 figures.-- PACS nrs.: 74.70.Ad, 74.10.+v, 74.25.Jb, 74.62.Fj.en_US
dc.description.abstractHigh-pressure structures of germane (GeH4) are explored through ab initio evolutionary methodology to reveal a metallic monoclinic structure of C2/c (4 molecules/cell). The C2/c structure consists of layerlike motifs containing novel "H2" units. Enthalpy calculations suggest a remarkably wide decomposition (Ge+H2) pressure range of 0–196 GPa, above which C2/c structure is stable. Perturbative linear-response calculations for C2/c GeH4 at 220 GPa predict a large electron-phonon coupling parameter λ of 1.12 and the resulting superconducting critical temperature reaches 64 K.en_US
dc.description.sponsorshipG. G., Y. M., and T. C. are thankful for financial support from the China 973 Program under Grant No. 2005CB724400, the NSAF of China under Grant No. 10676011, the Program for 2005 New Century Excellent Talents in University, and the Cheung Kong Scholars Program of China. Y. M. and A. R. O. gratefully acknowledge financial support from the Swiss National Science Foundation (Grant 200021-111847/1). A.B. acknowledges financial support from the EC 6th framework Network of Excellence NANOQUANTA (NMP4-CT-2004-500198).en_US
dc.format.extent1326514 bytes-
dc.publisherAmerican Physical Societyen_US
dc.subject[PACS] Superconducting metals, alloys and binary compoundsen_US
dc.subject[PACS] Occurrence of superconductivityen_US
dc.subject[PACS] Electronic structure of superconductorsen_US
dc.subject[PACS] Pressure effects on superconducting transition temperatureen_US
dc.titleSuperconducting high pressure phase of germaneen_US
dc.description.peerreviewedPeer revieweden_US
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